/Engine/Source/Runtime/Engine/Classes/Engine/TextureStreamingTypes.h
FStreamingTextureLevelContext ( [EMaterialQualityLevel::Type](API\Runtime\Engine\EMaterialQualityLevel__Type) InQualityLevel, [ERHIFeatureLevel::Type](API\Runtime\RHI\ERHIFeatureLevel__Type) InFeatureLevel, bool InUseRelativeBoxes )